Preserve extension names in module preflight

docs/runbooks/adapter-1c-mcp.md

@@ -777,14 +777,18 @@ which save-layer table is used by the copy plan and saved-state write smokes.
 Add `-RequireSelectorChainWritePlanComposition` when the selected base/object
 must have a saved-state stream that lets the selector-chain smoke compose a
 concrete read-only `metadata.write.plan`. The same strict mode also requires
-the write-preflight smoke to discover an extension form by public
-`extension/ref/form/member` names, compose an allowed plan, and prove that the
-repository and support gates use the same resolved `extension:<GUID>` layer.
-It then submits the same public selector with a deliberately different GUID
-and requires a read-only `blocked / extension_selector_conflict` result, so a
-legacy permissive repository profile cannot authorize a mismatched layer.
-Run that check directly with
-`scripts/smoke_1c_write_preflight.py --require-name-first-extension-form`.
+the write-preflight smoke to discover both an extension form and an extension
+module by public names (`extension/ref/form/member` and
+`extension/ref/form/module/stream_ordinal`), compose allowed plans, and prove
+that the repository and support gates use the same resolved
+`extension:<GUID>` layer. Module search restores the public extension name from
+`ConfigCASSave`; it never returns the storage GUID as the caller-facing
+selector. The smoke then submits each public selector with a deliberately
+different GUID and requires a read-only
+`blocked / extension_selector_conflict` result, so a legacy permissive
+repository profile cannot authorize a mismatched layer. Run both checks
+directly with
+`scripts/smoke_1c_write_preflight.py --require-name-first-extension-form --require-name-first-extension-module`.
 
 To exercise the MCP proxy itself, switch transport and URL: